/*
 * Copyright 1999-2017 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package studio.raptor.sqlparser.parser;

import java.util.HashMap;
import java.util.Map;

/**
 */
public class Keywords {

  public final static Keywords DEFAULT_KEYWORDS;
  public final static Keywords SQLITE_KEYWORDS;

  static {
    Map<String, Token> map = new HashMap<String, Token>();

    map.put("ALL", Token.ALL);
    map.put("ALTER", Token.ALTER);
    map.put("AND", Token.AND);
    map.put("ANY", Token.ANY);
    map.put("AS", Token.AS);

    map.put("ENABLE", Token.ENABLE);
    map.put("DISABLE", Token.DISABLE);

    map.put("ASC", Token.ASC);
    map.put("BETWEEN", Token.BETWEEN);
    map.put("BY", Token.BY);
    map.put("CASE", Token.CASE);
    map.put("CAST", Token.CAST);

    map.put("CHECK", Token.CHECK);
    map.put("CONSTRAINT", Token.CONSTRAINT);
    map.put("CREATE", Token.CREATE);
    map.put("DATABASE", Token.DATABASE);
    map.put("DEFAULT", Token.DEFAULT);
    map.put("COLUMN", Token.COLUMN);
    map.put("TABLESPACE", Token.TABLESPACE);
    map.put("PROCEDURE", Token.PROCEDURE);
    map.put("FUNCTION", Token.FUNCTION);

    map.put("DELETE", Token.DELETE);
    map.put("DESC", Token.DESC);
    map.put("DISTINCT", Token.DISTINCT);
    map.put("DROP", Token.DROP);
    map.put("ELSE", Token.ELSE);
    map.put("EXPLAIN", Token.EXPLAIN);
    map.put("EXCEPT", Token.EXCEPT);

    map.put("END", Token.END);
    map.put("ESCAPE", Token.ESCAPE);
    map.put("EXISTS", Token.EXISTS);
    map.put("FOR", Token.FOR);
    map.put("FOREIGN", Token.FOREIGN);

    map.put("FROM", Token.FROM);
    map.put("FULL", Token.FULL);
    map.put("GROUP", Token.GROUP);
    map.put("HAVING", Token.HAVING);
    map.put("IN", Token.IN);

    map.put("INDEX", Token.INDEX);
    map.put("INNER", Token.INNER);
    map.put("INSERT", Token.INSERT);
    map.put("INTERSECT", Token.INTERSECT);
    map.put("INTERVAL", Token.INTERVAL);

    map.put("INTO", Token.INTO);
    map.put("IS", Token.IS);
    map.put("JOIN", Token.JOIN);
    map.put("KEY", Token.KEY);
    map.put("LEFT", Token.LEFT);

    map.put("LIKE", Token.LIKE);
    map.put("LOCK", Token.LOCK);
    map.put("MINUS", Token.MINUS);
    map.put("NOT", Token.NOT);

    map.put("NULL", Token.NULL);
    map.put("ON", Token.ON);
    map.put("OR", Token.OR);
    map.put("ORDER", Token.ORDER);
    map.put("OUTER", Token.OUTER);

    map.put("PRIMARY", Token.PRIMARY);
    map.put("REFERENCES", Token.REFERENCES);
    map.put("RIGHT", Token.RIGHT);
    map.put("SCHEMA", Token.SCHEMA);
    map.put("SELECT", Token.SELECT);

    map.put("SET", Token.SET);
    map.put("SOME", Token.SOME);
    map.put("TABLE", Token.TABLE);
    map.put("THEN", Token.THEN);
    map.put("TRUNCATE", Token.TRUNCATE);

    map.put("UNION", Token.UNION);
    map.put("UNIQUE", Token.UNIQUE);
    map.put("UPDATE", Token.UPDATE);
    map.put("VALUES", Token.VALUES);
    map.put("VIEW", Token.VIEW);
    map.put("SEQUENCE", Token.SEQUENCE);
    map.put("TRIGGER", Token.TRIGGER);
    map.put("USER", Token.USER);

    map.put("WHEN", Token.WHEN);
    map.put("WHERE", Token.WHERE);
    map.put("XOR", Token.XOR);

    map.put("OVER", Token.OVER);
    map.put("TO", Token.TO);
    map.put("USE", Token.USE);

    map.put("REPLACE", Token.REPLACE);

    map.put("COMMENT", Token.COMMENT);
    map.put("COMPUTE", Token.COMPUTE);
    map.put("WITH", Token.WITH);
    map.put("GRANT", Token.GRANT);
    map.put("REVOKE", Token.REVOKE);

    // MySql procedure: add by zz
    map.put("WHILE", Token.WHILE);
    map.put("DO", Token.DO);
    map.put("DECLARE", Token.DECLARE);
    map.put("LOOP", Token.LOOP);
    map.put("LEAVE", Token.LEAVE);
    map.put("ITERATE", Token.ITERATE);
    map.put("REPEAT", Token.REPEAT);
    map.put("UNTIL", Token.UNTIL);
    map.put("OPEN", Token.OPEN);
    map.put("CLOSE", Token.CLOSE);
    map.put("CURSOR", Token.CURSOR);
    map.put("FETCH", Token.FETCH);
    map.put("OUT", Token.OUT);
    map.put("INOUT", Token.INOUT);

    DEFAULT_KEYWORDS = new Keywords(map);

    Map<String, Token> sqlitemap = new HashMap<String, Token>();

    sqlitemap.putAll(Keywords.DEFAULT_KEYWORDS.getKeywords());

    sqlitemap.put("LIMIT", Token.LIMIT);
    SQLITE_KEYWORDS = new Keywords(sqlitemap);
  }

  private final Map<String, Token> keywords;

  public Keywords(Map<String, Token> keywords) {
    this.keywords = keywords;
  }

  public boolean containsValue(Token token) {
    return this.keywords.containsValue(token);
  }

  public Token getKeyword(String key) {
    key = key.toUpperCase();
    return keywords.get(key);
  }

  public Map<String, Token> getKeywords() {
    return keywords;
  }

}
